[PATCH v4 0/5] Implement git stash as a builtin command

I've rewritten git stash as a builtin c command. All tests pass, and I've added two new tests. Test coverage is around 95% with the only things missing coverage being error handlers.

Changes since v3:
 * Fixed formatting issues
 * Fixed a bug with stash branch and added a new test for it
 * Fixed review comments

Outstanding issue:
 * Not all argv array memory is cleaned up

Joel Teichroeb (5):
  stash: add test for stash create with no files
  stash: Add a test for when apply fails during stash branch
  stash: add test for stashing in a detached state
  merge: close the index lock when not writing the new index
  stash: implement builtin stash

 Makefile                                      |    2 +-
 builtin.h                                     |    1 +
 builtin/stash.c                               | 1224 +++++++++++++++++++++++++
 git-stash.sh => contrib/examples/git-stash.sh |    0
 git.c                                         |    1 +
 merge-recursive.c                             |    9 +-
 t/t3903-stash.sh                              |   34 +
 7 files changed, 1267 insertions(+), 4 deletions(-)
 create mode 100644 builtin/stash.c
 rename git-stash.sh => contrib/examples/git-stash.sh (100%)